bare metal surface cleaning

https://yenkee-wiki.win/index.php/Meeting_NFPA_96_Requirements:_A_Practical_Guide_to_Kitchen_Exhaust_Safety

Getting a bare metal surface truly clean means cutting through years of grime without damaging the material. You'll want to start with a degreaser that cuts through oil and residue, then follow up with a wire brush or fine-grit sandpaper to remove any rust spots. Work in small sections and wipe away the loosened dirt before it dries again, which can leave streaks. For the final pass, use a clean rag and a solvent like mineral spirits to pick up any remaining particles, leaving the metal ready f…